The term 'activated sludge' is used to denote : (
This question was previously asked in
Shift 11/06/2023 3:30 PM - 6:30 PM
A
All solids that settle as sediment
B
Sediment containing all type of organic matter
C
Sediment containing bacterial flocs
D
Sedimentcontaining soil and small pebbles only
Correct Answer
Sediment containing bacterial flocs
Detailed Explanation
Once the BOD of sewage or waste water is reduced significantly, the effluent is then passed into a settling tank where the bacterial 'flocs' are allowed to sediment. This sediment is called activated sludge.
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